Question

can u explain please

The correct answer is: Both 6 cm. *Question 212: Concave Refracting Surface A very long glass rod has one end ground to a concave hemispherical surface of radius 5 cm. Its index of refraction is 1.5. A point object is on the axis in air a distance 20 cm from the surface. The image is: Select one: a. real and 30 cm from the surface (inside the glass rod). b. real, and 10 cm from the surface outside the glass rod). c. virtual, and 10 cm from the surface (inside the glass rod). d. virtual, and 20 cm from the surface outside the glass rod). e. virtual, and 10 cm from the surface outside the glass rod). The correct answer is: virtual, and 10 cm from the surface (outside the glass rod).

Answer 1

through spherical for refraction Surface , we know that where, u ginen, is the image distance R=-5 cm u=-20cm M2=1.5 fm,=1 bo na IC

So, ) bost to - to => 153-6***) > bizneho [ ^ ů s ve-10 the image is virtual (since u s u are on the same side of the refracting smface, after refraction throush the concave face the pays diverges & appeares to be coming from the image point, hence it is virtual. lo connect is option e. virtual, & 10 cm from the surface coutside the mod)